Pinblock Drilling Centering

[Farrell]

Lots of good suggestions on centering a hole, but Ron is the only one that touched on my real concern. I like the Bolduc blocks, but I have a general concern about using them on a no-bushing plate. I was planning on using (for the first time) a Delignit block on this M&H upright. 

My question is how much movement of the pin due to string pulling will occur with a Delignit block and with a Bolduc block? My guess is that there will be measureable movement of a pin with the Bolduc block (but how much???), and somewhere between zero and negligible pin movement with the Delignit block. But I sure don't know for sure. What does experience say?

Perhaps the bottom line can be stated another way. How much, if any, should I favor the pianist side of the hole to end up with a centered tuning pin once tension is applied to strings with a Bolduc block and with a Delignit block?

Terry Farrell
  
----- Original Message ----- 
From: "Ron Nossaman" <RNossaman@cox.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, October 22, 2002 11:44 PM
Subject: Re: Pinblock Drilling Centering


> 
> >I have never done one of these before, but I fear that if you drill the 
> >hole in the middle of the plate hole you will end up with the tuning pin 
> >riding the plate on the rear side of the hole.
> >
> >Terry Farrell
> 
> Part of the job is drilling out the plate webbing holes big enough that 
> this won't happen. If you aren't using a low density block that won't 
> support a tuning pin without having the pin riding the plate, the hole is 
> too small anyway.
> 
> Ron N
> 
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